Question

part a
newtons second law in 1 dimension: what magnitude net force is required to accelerate a 1200 - kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
444 n
1620 n
11,800 n
4360 n
3240 n

Explanation:

Step1: 求加速度

根据加速度公式\(a=\frac{v - v_0}{t}\)，其中\(v = 27.0m/s\)，\(v_0 = 0m/s\)，\(t = 10.0s\)，则\(a=\frac{27.0 - 0}{10.0}= 2.7m/s^2\)。

Step2: 求合力

根据牛顿第二定律\(F = ma\)，\(m = 1200kg\)，\(a = 2.7m/s^2\)，则\(F=1200\times2.7 = 3240N\)。

Answer:

\(3240N\)